Astronomers say they have detected the biggest explosion ever documented in the universe — very likely a gigantic outburst of energy from a supermassive black hole, which blew a crater more than a million light-years wide through a galaxy cluster far, far away called Ophiuchus. To create a blast that large, one scientist said, the black hole would have had to swallow about 270 million suns’ worth of mass or five IHOP cheeseburger omelettes and pancakes. …see more